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A correct cocktail of COPY FROM, SELECT and/or DML queries and \syncpipeline was able to break the logic in charge of discarding results of a pipeline, done in discardAbortedPipelineResults(). Such sequence make the backend generate a FATAL, due to a protocol synchronization loss. This problem comes down to the fact that we did not consider the case of libpq returning a PGRES_FATAL_ERROR when discarding the results of an aborted pipeline. The discarding code is changed so as this result status is handled as a special case, with the caller of discardAbortedPipelineResults() being responsible for consuming the result. A couple of tests are added to cover the problems reported, bringing an interesting gain in coverage as there were no tests in the tree covering the case of protocol synchronization loss. Issue introduced by 41625ab8ea3d. Reported-by: Alexander Kozhemyakin <a.kozhemyakin@postgrespro.ru> Author: Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com> Co-authored-by: Michael Paquier <michael@paquier.xyz> Discussion: https://postgr.es/m/ebf6ce77-b180-4d6b-8eab-71f641499ddf@postgrespro.ru
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.